I'm running a CurseForge custom modpack and am using the following version - Chargers-1.18.2-4.2.1.14.jar

If I remain close to my base, I'm having no issues with item/inventory wireless charging when I return to the base.

I am using FTB Chunks (ftb-chunks-forge-1802.3.6-build.145.jar) to keep my base force loaded.

If the chunk unloads; like when I go to the Nether, the End or go further than 12 chunks from my base, when I return, my items/inventory will not charge.

If I break and re-place the wireless charger, charging resumes.

Let me know if there is any more information you require.

Sorry for the long wait, I've had a look at this and can't reproduce the issue.
There is no issue leaving the chunk and coming back with or without FTBChunks for me.